Return to the Hydrangea Forum | Post a Follow-Up

why no blooms

Posted by Olympiad 4b (My Page) on
Fri, Jun 15, 12 at 21:31

There are 9 hydrangea plants, 3 bloom a blue bloom on the cool side of each plant. There are 6 other hydrangeas with in 75 yards that produce no blooms but have large leaves.
Of these 3 receive about 7 hours of sun and the other 3 receive about 4-5 hours of sun and much light reflected from a 6 story building. What could cause the plants to show no blooms? Could it be too much water is supplied from an irrigation system? Your help is greatly appreciated. Also this happened last year too.

Follow-Up Postings:

RE: why no blooms

Hello, Olympiad. From your description of the bloom color (blue), it would seem that the hydrangeas are mopheads. These types of hydrangeas can live in very cold zones but their blooms (and-or stems) do not survive winter. This type of problem is sometimes called planting out of zone. As a result, when growth begins in the Spring, all grow originates from the crown or base & last year's stems look dried out and lifeless. If the mopheads only blooms once a year, you get no flowers.

Mopheads normally develop flower buds in July-August. To make sure that the stems & their flower buds survive your winter, you will need to apply winter protection techniques. Make sure you do not prune the mopheads in July or later because then you will be getting rid of the Spring blooms.

Reblooming mopheads.... there are mopheads for sale that develop flower buds in July-August, bloom in Spring and then rebloom all over again. They do this multiple times throughout the growing season. Reblooming mophead hydrangeas can be of help in very cold locations like yours. If the winter cold and winds dry out the stems or kill the flower buds, these plants will leaf out from the crown and develop new flower buds so you will get blooms no matter what. The Endless Summer Series and the Forever & Ever Series are some examples of these.

Too much fertilizer is also a possibility. Hydrangeas do not need fertilizer like roses do and a single application will last for the whole growing season. However, if you use a fertilizer nigh in nitrogen multiple times through the year then at some point, the plant will be producing nice green leaves and little to no blooms. A soil pH kit sold at plant nurseries can help determine if your soil's nitrogen levels are high.

Too much shade or dense shade can also contribute to bloomage problems. However, based on your comments, these shrubs are getting enough sunlight.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Hydrangea Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here